SQLite.php

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<?php
class PHPExcel_CachedObjectStorage_SQLite extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache {

        private $_TableName = null;

        private $_DBHandle = null;

        protected function _storeData() {
                if ($this->_currentCellIsDirty && !empty($this->_currentObjectID)) {
                        $this->_currentObject->detach();

                        if (!$this->_DBHandle->queryExec("INSERT OR REPLACE INTO kvp_".$this->_TableName." VALUES('".$this->_currentObjectID."','".sqlite_escape_string(serialize($this->_currentObject))."')"))
                                throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
                        $this->_currentCellIsDirty = false;
                }
                $this->_currentObjectID = $this->_currentObject = null;
        }       //      function _storeData()


        public function addCacheData($pCoord, PHPExcel_Cell $cell) {
                if (($pCoord !== $this->_currentObjectID) && ($this->_currentObjectID !== null)) {
                        $this->_storeData();
                }

                $this->_currentObjectID = $pCoord;
                $this->_currentObject = $cell;
                $this->_currentCellIsDirty = true;

                return $cell;
        }       //      function addCacheData()


        public function getCacheData($pCoord) {
                if ($pCoord === $this->_currentObjectID) {
                        return $this->_currentObject;
                }
                $this->_storeData();

                $query = "SELECT value FROM kvp_".$this->_TableName." WHERE id='".$pCoord."'";
                $cellResultSet = $this->_DBHandle->query($query,SQLITE_ASSOC);
                if ($cellResultSet === false) {
                        throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
                } elseif ($cellResultSet->numRows() == 0) {
                        //      Return null if requested entry doesn't exist in cache
                        return null;
                }

                //      Set current entry to the requested entry
                $this->_currentObjectID = $pCoord;

                $cellResult = $cellResultSet->fetchSingle();
                $this->_currentObject = unserialize($cellResult);
        //    Re-attach this as the cell's parent
        $this->_currentObject->attach($this);

                //      Return requested entry
                return $this->_currentObject;
        }       //      function getCacheData()


        public function isDataSet($pCoord) {
                if ($pCoord === $this->_currentObjectID) {
                        return true;
                }

                //      Check if the requested entry exists in the cache
                $query = "SELECT id FROM kvp_".$this->_TableName." WHERE id='".$pCoord."'";
                $cellResultSet = $this->_DBHandle->query($query,SQLITE_ASSOC);
                if ($cellResultSet === false) {
                        throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
                } elseif ($cellResultSet->numRows() == 0) {
                        //      Return null if requested entry doesn't exist in cache
                        return false;
                }
                return true;
        }       //      function isDataSet()


        public function deleteCacheData($pCoord) {
                if ($pCoord === $this->_currentObjectID) {
                        $this->_currentObject->detach();
                        $this->_currentObjectID = $this->_currentObject = null;
                }

                //      Check if the requested entry exists in the cache
                $query = "DELETE FROM kvp_".$this->_TableName." WHERE id='".$pCoord."'";
                if (!$this->_DBHandle->queryExec($query))
                        throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));

                $this->_currentCellIsDirty = false;
        }       //      function deleteCacheData()


        public function moveCell($fromAddress, $toAddress) {
                if ($fromAddress === $this->_currentObjectID) {
                        $this->_currentObjectID = $toAddress;
                }

                $query = "DELETE FROM kvp_".$this->_TableName." WHERE id='".$toAddress."'";
                $result = $this->_DBHandle->exec($query);
                if ($result === false)
                        throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());

                $query = "UPDATE kvp_".$this->_TableName." SET id='".$toAddress."' WHERE id='".$fromAddress."'";
                $result = $this->_DBHandle->exec($query);
                if ($result === false)
                        throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());

                return TRUE;
        }       //      function moveCell()


        public function getCellList() {
                if ($this->_currentObjectID !== null) {
                        $this->_storeData();
                }

                $query = "SELECT id FROM kvp_".$this->_TableName;
                $cellIdsResult = $this->_DBHandle->unbufferedQuery($query,SQLITE_ASSOC);
                if ($cellIdsResult === false)
                        throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));

                $cellKeys = array();
                foreach($cellIdsResult as $row) {
                        $cellKeys[] = $row['id'];
                }

                return $cellKeys;
        }       //      function getCellList()


        public function copyCellCollection(PHPExcel_Worksheet $parent) {
                $this->_currentCellIsDirty;
        $this->_storeData();

                //      Get a new id for the new table name
                $tableName = str_replace('.','_',$this->_getUniqueID());
                if (!$this->_DBHandle->queryExec('CREATE TABLE kvp_'.$tableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB)
                                                                                                        AS SELECT * FROM kvp_'.$this->_TableName))
                        throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));

                //      Copy the existing cell cache file
                $this->_TableName = $tableName;
        }       //      function copyCellCollection()


        public function unsetWorksheetCells() {
                if(!is_null($this->_currentObject)) {
                        $this->_currentObject->detach();
                        $this->_currentObject = $this->_currentObjectID = null;
                }
                //      detach ourself from the worksheet, so that it can then delete this object successfully
                $this->_parent = null;

                //      Close down the temporary cache file
                $this->__destruct();
        }       //      function unsetWorksheetCells()


        public function __construct(PHPExcel_Worksheet $parent) {
                parent::__construct($parent);
                if (is_null($this->_DBHandle)) {
                        $this->_TableName = str_replace('.','_',$this->_getUniqueID());
                        $_DBName = ':memory:';

                        $this->_DBHandle = new SQLiteDatabase($_DBName);
                        if ($this->_DBHandle === false)
                                throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
                        if (!$this->_DBHandle->queryExec('CREATE TABLE kvp_'.$this->_TableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB)'))
                                throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
                }
        }       //      function __construct()


        public function __destruct() {
                if (!is_null($this->_DBHandle)) {
                        $this->_DBHandle->queryExec('DROP TABLE kvp_'.$this->_TableName);
                }
                $this->_DBHandle = null;
        }       //      function __destruct()


        public static function cacheMethodIsAvailable() {
                if (!function_exists('sqlite_open')) {
                        return false;
                }

                return true;
        }

}